It depends on who you're with and the intent behind your joke...If it's mean and said in a way that it's meant to be offensive, then don't do things like that. But if you're just kidding around with some friends of yours, and making light-hearted jokes (esp. if you're of that race) then it's okay. Just don't let things get out of hand.

we do this aaaaaaaaaaaaalllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll time cuz we noticed were like the united natios we're all differnt races but we always mess with each other with stereotypes and what not but we're friends and we kbow its only a joke in fact one time we were playin maplestory and we came up with our race powers and used our skills for them

Racism is really an offense to those who're being said. African-Americans, Asians, Yada-Yada, they're all from the Human Race. I don't see why some people look down on them. Unless, doing it for fun means that those people lived to have fun laughing that they're Asians.
Gah. The gap between the human mind and the human heart really is far. All they think is what they only should think. They should be precise if they're being offensive. EVEN IF IT'S FOR FUN.
Also, to people that wanted to tell to people that they're having fun laughing at Humans.... Well... Good Luck. Hopefully, you people should know that you guys are only causing some sort of Emotional Breakdown, or a Trauma. Yes, I said Trauma.

Yeah, sure. As long as it's not too serious. But if someone tells you to stop, you should stop instead of trying to provoke them even more. If you're close to that person and they're fine with it, sure why not? It's very hilarious. (:

Of course it is logically wrong to make fun of people of other races. That is so rude and offensive. Although it is true that we do laugh at racial stereotypes and sometimes it seems ok to most people, we should understand that there are people out there who are very proud of their own race and culture and are very sensitive towards such issues. By making fun at their races, we are not showing them respect and it will also reflect that we are not very self-respectful..

The funny thing is that there is no such thing as race. Ever heard of the Mitochondrial Eve? The common mother of all human beings? The mother we all descend from and genetically relate to? There is one race: The human race. Skin color has nothing to do with it. I will explain why.

We all started out as "African-American" (Black) because the first modern humans originated in Africa. To make a long story short, the Mitochondrial Eve's descendents had the best genetic material for survival (From her. Hers was the strongest to breed) and when food grew short, the migrated out first into lower Asia and then to Australia and then to North America and South America (Europe was not migrated into until after the last Ice Age).

Now here's where skin color comes in: Melatin. Melatin is our natural defense against the UV rays from the sun and colors us accordingly to the environment (I.E. Harsh environment like the Sahara = More melatin and darker the color. The less melatin you have, the lighter complexion you have). Melatin levels changed as humans no longer needed such protection as they migrated. It became lesser as the migrated to less harsh climates like Australia and India.

In a nutshell, there is no such thing as "race". It's just Melatin levels. We're all human so it doesn't matter. The only difference between a black man and myself is that he's less likely to get sunburned than I am. That's it. No one is superior. Some people are just more or less apt to survive a harsh sun.

Poke fun at "race" all you like but you're just stupid then.

ORLY? Then explain why different races are more prone to disorders such as black people getting Sickle Cell Anemia. Melatin is the reason for variances in skin color but after it happened we changed in other ways and races have other differences.

"Race" is just a social construct and is therefore artificial. It is more "correct" to use the term ethnicity. And, in many cases, we have more in common genetically with people from other "races" than we do with our own family members. As for skin color, eyes, etc, it is all due to environmental adaptation, like skygod says. "Asian" eyes, for example, are "slanted" due to the high wind velocity in Asia. These adaptations were then passed down through our parents.

As for the disorders, I'm not too sure, but I think it probably has something to do with cell/DNA mutations. Sickle Cell Anemia is a hereditary disease, so it's likely that its due to children being born from the same "racial" gene pool. But that is just speculation on my part, so if I'm wrong, feel free to correct me.